The Great Salt Lake's Slow Disappearance

Stand at the edge of Antelope Island on a still afternoon and the Great Salt Lake stretches to the horizon in every direction, a shallow inland sea so salty that almost nothing lives in it except brine shrimp and brine flies. This is the remnant. The lake you are looking at is roughly half of what it was a hundred and fifty years ago.

The Great Salt Lake was once the largest saltwater lake in the Western Hemisphere outside the Caspian Sea. Since the eighteen seventies, it has lost roughly half of its surface area, with some scientific assessments putting the loss even higher. In two thousand twenty-two, the lake reached its lowest recorded level in the documented history of the region. The primary cause is upstream water diversion for agriculture and municipalities, demand that the Colorado Plateau's arid climate cannot sustainably supply.

What that shrinkage uncovers matters beyond the loss of water. The exposed lakebed is contaminated with arsenic and heavy metals deposited over centuries of industrial and agricultural runoff. When wind moves across the dry lake bottom, those contaminants become airborne dust over the Wasatch Front, the most densely populated strip of Utah. Twelve million migratory birds depend on the lake annually as a staging ground; brine shrimp, the base of that food chain, require the salinity the shrinking lake can no longer sustain consistently.

For the Goshute people, whose communities inhabited the lake's western shores for thousands of years and for whom brine fly pupae were a critical protein source, the lake's collapse is not an ecological abstraction. The Confederated Tribes of the Goshute Reservation document the cultural and subsistence dimensions of the crisis in a way the mainstream conservation conversation rarely foregrounds. The lake is shrinking. What is underneath is not nothing.